No. of Days
1
2
3
4
5
6
No. of students
20
2x
60
40
x
50
The distribution above shows the number of days a group of 260 students were absent from school in a particular term. How many students were absent for at least four days in the term?
A
180
B
120
C
110
D
40
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
20 + 2x + 60 + 40 + x + 50 = 260
170 + 3x = 260
3x = 260 - 170
3x = 90
x = 90/3 = 30
At least 4 days
4 days = 40
5 days = 30
6 days = 50
Total = 120
Source: Myschool Past Questions Archive (Record #9364)